US1930234A - Refrigerator tray or drawer - Google Patents

Description

Oct 1933- A. .1. FELTAULT 1 1,930,234

REFRIGERATOR TRAY OR DRAWER Filed March 18, 1932 3 Sheets-Sheet l VENTOR B 1 g I 2 Z 6 (/51 ATTORNEY Oct. 10, 1933. 'A. J. FELTAULT REFRIGERATOR TRAY OR DRAWER Filed March 18, 1932 s Sheet s-Sheet 2 .4446 ATTORNEY Oct. 10, 1933. J FELTAULT 1,930,234

REFRIGERATOR TRAY OR DRAWER Filed March 18, 1932 5 Sheets-Sheet 3 ATTO R N EY w Wm Patented Oct. 10, 1933 UNITED STATES PATENT OFFICE REFRIGERATOR TRAY OR DRAWER Arthur J. Feltault, Bloomfield, N. J., assignor to Efesem Inc., New York, N. Y., a'corporation of New York Application March 18, 1932. Serial No. 599,673

17 Claims. (01. 259-99) My invention relates to refrigeration and it has more particular reference to a removable tray or drawer adapted to be inserted into the ordinary frame or rack provided within the absorption coil of a household or other mechanical refrigerator, and especially into the rack usually provided for the ice cube trays.

In various mechanical refrigerators, such as are operated electrically or by gas to mechanically ex-- The general object of the present invention is.

to provide a tray or drawer which may be introduced into the refrigerator, preferably in the rack referred to, and the tray is intended to be used in the making of ice cream and various frozen desserts in the refrigerator, the same as might be made in an ice cream freezer.

The device consists, primarily, of a tray or drawer for holding material or liquid which is to be frozen and for this tray or drawer a cover is provided and means are associated with the cover for agitating the fluid held in the tray in order to bring about a gradual and uniform freezing action throughout the material and to avoid separation while the freezing action is going on Heretofore, it has not been possible to make ice cream and frozen desserts in refrigerator trays or drawers which is smooth and even in texture, because there were no means provided for agitating the liquid from time to time to prevent it from separating, and to have the liquid freeze evenly throughout. It is the particular object of the present invention to provide a tray or drawer for holding the liquid and to provide simple means accessible from the exterior of the tray, preferably the front thereof, which may be operated without removing the tray or drawer from the rack, for the purpose of moving the agitating device which is disposed within the drawer and within the liquid.

The liquid of which the ice cream or frozen dessert is to be made is placed within the tray or drawer and the cover is applied to the latter. The covered tray or drawer and its contents are placed in the refrigerator in thereof, such as in the cube the coldest portion tray rack, in order that the material may be subjected to the coldest temperature within the refrigerator. From time to time the operator may open the refrigerator door, take hold of the oper ating device at the front of the tray without removing the latter from the rack, and without removing the cover from the tray or drawer, and operate the agitating device so that all portions ofthe body of liquid in the drawer will be thoroughly agitated to insure quick and even cooling of all portions thereof.

In my co-pending application Serial No. 52,847, filed July 24, 1931 and in my co-pending applications Serial Nos. 599,672 and 599,671, filed concurrently herewith I have shown a refrigerator tray or drawer designed for the same general purposes as the present invention.

One object of the present invention is to simplify the construction as well as to simplify'the assembling and disassembling of the several parts of the device to permit them to be cleaned. An-

other object is to reduce the cost of manufacturing the tray or drawer, including the agitating device.

In the present case I emplo y one or, preferably,

two oscillating agitators which project intotheliquid within the tray or dra tators are moved lengthwise of the drawer and wer and which agimembers on the agitators to cause the agitators to oscillate as they are reciprocated along the tray, in order to effect an oscillating movement of the agitators simultaneously with their bodily movement along the tray or drawer, in order to effect a complete agitation of the material in thetray. By using the undulating members it'is possible to eliminate gears and racks from the construction, thereby not only reducing the cost of manufacture of the article but also to provide ,a

device which is more readily lized.

cleansed and steri- Other features and advantages will be set fort in the following detailed description of my invention.

In the drawings forming part of this application, 1 Figure 1 is a plan view o embodying my invention,

f 'a tray or drawer Figure 2 is a plan view of a portion of the device with parts broken away and showing the parts in the position when the slider is drawn out nearly its full extent,

Figure 3 is a fragmentary plan view with the parts in the position when the slider is partially retracted and illustrating the oscillating action of the agitators,

Figure 4 is a sectional view taken on the line 4--4 of Figure 1,

Figure 5 is a sectional view taken on the line 5-5 of Figure 2,

Figure 6 is a sectional view taken on the line 66 of Figure 1,

Figure 7 is an assembly view of fragments of the tray, cover and slider,

Figure 8 is a perspective view of a key for looking the agitators on the slider,

Figure 9 is a plan view of one of the agitators,

Figure 10 is an elevation thereof,

Figure 11 is a sectional view taken on the line 1111 of Figure 10,

Figure 12 is a plan view of a tray device embodying my invention in a modified form,

Figure 13 is a sectional view taken on the line 1313 of Figure 12,

Figure 14 is a plan view of a portion of the device shown in Figure 12 with parts broken away,

Figure 15 is a perspective view of one of the agitators with a portion of the plate which carries the same,

Figure 16 is a sectional view taken on the line '1616 of Figure 12, and

Figure 17 is a sectional view taken on the line 17-17 of Figure 12.

I will first describe the construction illustrated in Figures 1 to 11 inclusive. In this embodiment of my invention I have shown a long, narrow tray 1 having a bottom wall 2, side walls 3 and end walls 4, 5 forming a compartment 6 to contain material to be frozen, such as ice cream mixture or any substance from which frozen desserts may be made. This tray is, preferably, made of such proportions and such shape that it may be placed in the ordinary tray rack of a mechanical refrigerator which rack is formed within the absorption coil of the refrigerator in the same manner as illustrated in my said co-pending application Serial No. 552,847.

The top of the tray is open and it is adapted to be closed by means of a cover 7 consisting of a wall extending over the top of the tray and provided with a depending flange 8 which rests upon the curved flange 9 at the top of the tray to prevent foreign material from entering the tray while the freezing operation is being carried out.

This cover is provided with a guiding member which is preferably located centrally thereof and which is, preferably. formed integral with the cover in order to reduce the number of parts and the cost of construction. In the drawings I have shown this guiding member as a raised, embossed rib 10 extending lengthwise and centrally of the cover, the major portion of its length. This guiding member may be formed by drawing up the metal of which the cover i made and in the drawings the guiding member is shown as provided with a rounded top to form a smooth mem-- her with which the slider engages and by which it is guided.

I prefer to provide two agitators arranged on opposite sides of the median line of the cover, and as I have shown this arrangement in the drawings'I will describe thesame without intending to limit the invention to a structure having any particular number of agitators.

In the drawings I have shown two slots 11 formed in the cover and disposed on opposite sides of the median line thereof and therefore on opposite sides of the guiding member 10. These slots or openings are preferably formec. by perforating the material of which the cover is made and bending the material upwardly at opposite sides of the slots to form flanges 12 which serve in the manner hereinafter described.

The slots 11 are shown as of uniform width throughout but instead of being straight they are curved or undulating, and in the preferred construction there are a series of curves or loops 13 formed at regular intervals throughout the length of the slots, as viewed in Figures 1, 2 and 3; and these undulating slots extend a substantial portion of the length of the cover. The flanges 12 at the sides of the respective slots are therefore undulating in shape since they follow the shape of the grooves and the flanges on opposite sides of each groove are parallel to each other or in other words they are preferably spaced uniformly from each other along the grooves.

I provide operating means for reciprocating the agitators which are accessible for operation outside of the tray or drawer and I have shown this means as consisting of a slider 14 which reciprocates lengthwise of the cover. Preferably, this slider is placed over the cover and is made of such length and width as to cover the slots 11 when the slider is in its retracted position in order to prevent foreign matter passing through the slots and entering the tray or drawer. This slider is shown as provided with an embossed member 15 having a longitudinal groove on its under side to permit the member 15 to rest upon and conform to the curved top of the guiding member 10 of the cover, so that the slider, by co-operation with the guiding member, is guided to move in a longitudinal direction lengthwise of and above the cover.

The sliding member is provided with a forward extension 16 which is preferably curved downwardly to form a grip or handle 17 lying at the forward end of the tray or drawer and adapted to be grasped by the hand of the operator for the purpose of moving the slider lengthwise of the tray or drawer.

While the agitators may be constructed in different ways without departing from the spirit and scope of my invention, I have shown them constructed in the following manner; and as both 1 agitators are alike, the description of one applies to both. The agitator consists of a metal strip 18 bent into substantially a rectangular shape with the overlapping ends comiected by rivets or other means 19, as shown in Figures 9 to 11 inclusive. This provides a top member 20 with depending side portions 21, and a bottom member 22. The latter member is shown as provided with lateral extensions 23 which are curled upwardly. There are two posts 24 riveted to the top member 20 of the agitator adjacent opposite ends thereof, and these posts have circumferential grooves 25 near their upper ends.

The posts 24 of the agitators project through the slots 11 so as to lie between the flanges 12;

and the upper ends of the posts are attached to the slider, preferably by means of a key such as is shown in Figure 8. This key 26 has a central slot 27 through which extends a rivet 28 which connects the key to the top of the slider in a manner which permits the key to be moved in the direction of the slot 2'7.

At opposite ends of the key there are slots 29 opening into the enlarged circular opening 30. The keys remain attached to the slider and when it is desired to attach an agitator to the slider the agitator is presented to the under side of the slider so that the posts 24 project through the slots 11 with the upper ends of the posts projecting through the arcuate slots 31 of the slider.

When the posts are projected through the slider, the key must be positioned with the enlargements 30 in register with the posts, so that the upper ends of the latter are projected through the enlargements. While the agitator is held in this position the key is pushed along the top surface of the slider so that the edgesof the restricted portions 29 pass into the peripheral grooves of the posts, whereupon the keys lock the agitator to the slider but permit the agitator to oscillate with the rivets 28 as their axes. The arcuate slots 31 formed in the slider and through which the posts 24 extend, allow the agitators to oscillate. To disassemble the several parts it is only necessary to slide the keys in the directions necessary to bring the enlarged openings to register'with the posts and this unlocks the agitators, and allows them to be disengaged from the slider, and it also releases the slider from the cover.

Assuming the agitators are assembled in the manner. shown in Figures 1 to 6 inclusive, the device may be used as follows: A supply of liquid which is to be frozen is placed in the compartment 6 of the tray or drawer and then the cover with the slider mounted thereon and with the agitators depending from the cover is-applied to the tray, as shown in the drawings, so that the agitators project into the liquid in the compartment 6. v

The slider is then disposed above the cover or outside of the tray or drawer and it is therefore away from the material in the compartment 6. The tray or drawer with the liquid contained in it are then inserted into the tray rack of a refrigerator in the manner shown in my said copending application, Serial No. 552,847.

From time to time the operator will open the door of the refrigerator and grasp the handle 17 of the slider and move the slider back and forth longitudinally of the tray or drawer. As the slider is reciprocated it carries the agitators with it so that these move lengthwise of the tray substantially the full length thereof.

While the slider is moving back and forth the agitators are oscillated around the rivets 28 because the posts 24 of each agitator pass through one of the slots 11 of the cover and as the agitators move lengthwise of the tray the posts are caused to take undulating paths corresponding with the curves 13 of the slots 11. The agitators are therefore oscillated as illustrated in Figures 1, 2 and3 so that the combined oscillating and reciprocating motion causes the agitators to act on substantially all portions of the body of material within the tray. Their action is to agitate the liquid so that all portions thereof will be brought into contact with the interior surfaces of the tray in order that the material will be cooled uniformly rather than locally.

The agitators also disturb the liquid and prevent the formation of lumps and the mechanical agitation of the liquid prevents separation. The operator will perform the operation of reciprocating the slider a number of times when the tray or drawer is first placed in the refrigerator and until the material in the tray has more or less been turned into a solid mass. After that, the tray may remain in the refrigerator for such time as may be desirable to complete the freezing operation.

It will be observed that the slider serves to cover the slots 11 when it is in the position shown in Figure 1. The central projection 10 co-operating with the member 15 serves to guide the slider during its reciprocating motion along the cover.

When the freezing operation is complete, the tray or drawer may be removed from the refrigerator, whereupon the cover, slider and agitators may be lifted off the tray. For the purpose of cleaning the parts the keys 26 may be slid to release the agitators so that the latter will be detached from the slider and both the agitators and slider will then be released from the cover. All of these parts may then be washed or sterilized.

It will be apparent that the undulating shape of the slots 11 causes the several posts to follow' undulating paths while the slider and agitators are being reciprocated and that this action causes the agitators to be oscillated at the same timethat they reciprocate in the tray, and this causes the agitators to act on all portions of the liquid within the tray. This double movement of the agitators is executed by the simple sliding action of the slider and by the flanges 12 of the slots 11 acting upon the posts to oscillate the agitators.

In the present construction the use of gears or racks for oscillating the agitators may be avoided and this reduces the cost of construction of the device and provides for a device which is very easy to clean. Both the cover and the slider, as well'as the keys and the agitator may all be stamped from sheet metal so that the entire device may be made by stamping and forming operations with the possible exception of the posts and the rivets. This permits the device to be produced in large quantities at low cost.

In Figures 12 to 17 inclusive I have shown a modified form of the invention wherein the slider is arranged inside the cover as are also the undulating'members for oscillating the agitators. In this construction the tray is shown as corresponding with the tray in the first form and the parts of the tray are similarly lettered.

The cover 32 in this form of the device is provided with the flange 33 fitting over the flange of the tray. Extending lengthwise of the cover there is a raised portion 34 which may be formed by embossing or drawing the metal of which the cover is made, so that a longitudinally extending chamber 35 is formed on the under side of the cover. Within this chamber there are secured to the under side of the raised portion of the cover longitudinally extending bars 36 arranged in opposed positions and secured to the cover by the rivets 37. These bars have oppositely arranged flanges 38 which, together with the under side of the cover form a raceway 39 in which the slider 40 is adapted to move.

The slider projects forwardly through an opening 41 in the forward end of the cover flange and it is provided with the handle portion 42 at the front of the tray. The bars 36 at their outer sides are provided with the undulating edges 43 which serve to oscillate the agitators as hereinafter described. There is a plate 44 having a central raised portion 45 adapted to extend between the flanges 38 of the bars 36 and to be attached to the bottom surface of the slider by means of the bolt 47 and wing nut 46 so that the plate is detachably connected with one end of the slider.

The plate 44 extends laterally at both sides of the slider and it travels just beneath the under surfaces of the bars 36. In-the opposite ends of the plate 44 there are riveted vertical shafts 48 which project downwardly and terminate adjacent the bottom of the tray. Each agitator includes a plate 49 provided with a central aperture which receives a portion of the shaft 48 therein and the plate is secured between the fixed collar 50 on the shaft and the plate 44 where it is loosely held to permit the plate 44 to oscillate around the shaft.

I have shown the agitators as constructed in a modified form and they consist, in part, of the U shaped arms 51 the ends of which are riveted to two diagonal corners of the plate 44. These arms have vertically extending portions 52 connected with the horizontal portion 53, the latter lying adjacent the bottom wall of the tray when the parts are in active position. There is another U shaped member comprising the vertical arms 54 and the horizontal arm 55 and this member has its opposite ends connected with two diagonal corners of the plate 44. The members 51 and 54 are disposed in crossed relation, so that the bars 53, 55 form an X. The bar 53 has a central aperture to receive the reduced end of the shaft 48 on which it is attached by meansv of the turned-over or riveted end 56 of the shaft. The arm 55 is curved upwardly, as shown at 57 and is provided with a central aperture through which the shaft passes. The U shaped members, therefore, pivot around the shaft 48.

Theretare two pins 59 fixed to the plate 49 of each agitator and arranged on opposite sides of the shaft 48 and these pins or posts project into the chamber 35 under the cover and engage against the undulating edges 43 of the two bars 36. The two agitators, together with the plate 44 are furnished in assembled condition; that is to say, the agitators are factory assembled on the plate 44.

The parts are assembled in relation to the cover by inserting one end of the slider through the slot 41 in the flange of the cover and pushing the slider between the under side of the cover and the flanges 38. The plate 44, together with the agitators, are then applied to the under side of the bars 36 so that the central projection 45 of the plate extends between the flanges 38 and the bolt 47 is received through the central apertureof the plate 44..

The wing nut 46 is then applied to the threaded end of the bolt 47 which extends downwardly through the plate, and the wing nut is tightened to secure the plate 44 to the slider. This assembles the slider, the plate 44 and the agitators upon the cover. The liquid to be frozen is placed in the tray and the cover isapplied to the top of the tray so that the agitators extend into the liquid to a point adjacent the bottom of the tray. The device is operated the same as the first described device, that is to say, the operator will grasp the handle 42 and move the slider 40 lengthwise of the tray, the slider being guided in the raceway 39. This will reciprocate the the agitators to be oscillated in relation to their shafts 48 simultaneously with their reciprocating motion. This effects the same sort of agitation of the material in the tray as is effected by the agitators in the first described device.

In this form of the invention the operating means is mounted on the inside of the cover, whereas in the first form the operating means of the agitators is disposed outside the cover. The second described form of the invention may also be inexpensively made as all of the parts, with the exception of the bolt 47 and the shaft 48 may be stamped from sheet metal.

Having described my invention, what I claim is:

1. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, an undulating member associated with said cover, an agitator movable bodily through said tray and projecting into the liquid therein, and means for moving said agitator through the tray, said agitator having means engaging said undulating member whereby the latter will act to automatically oscillate the agitator as the same is moved bodily through the tray;

2. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, undulating members associated with said cover and arrangedon opposite sides of the median line thereof, agitators movable bodily through said tray and projecting into the liquid contained therein, and common means for moving said agitators through the tray, said agitators each having means engaging one of said'undulating members whereby the latter will act to oscillate the agitators as the same are moved bodily through the tray. I

3.'A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, an undulating member associated with said cover, an agitator movable bodily through said tray and projecting into the liquid contained therein, a slider for moving said agitator through said tray, means for guiding the slider lengthwise of the cover, means associated with said slider for revolvably holding said agitator, said agitator having means engaging said undulating member whereby the latter will act to oscillate the agitator as the same is moved bodily through the tray.

4. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having an undulating slot therein, an agitator depending from said cover and movable bodily through said trayv and projecting into the liquid therein, a slider movable in relation to said cover and adapted to move the agitator through the tray, said agitator having means projecting through the undulating slot in said cover whereby when said agitator is moved through the tray it will be oscillated by the edges of said undulating slot.

5. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, 2, cover for said tray, an undulating member associated with said cover, an agitator movable bodily through said tray and projecting into the liquid therein, means for moving said agitator through said tray, and a plurality of members associated with said agitator and simultaneously engaging said undulating member whereby the latter will act to oscillate the agitator as the same is moved bodily through the tray.

6. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, an undulating member associated with said cover, an agitator movable bodily through said tray and projecting into the liquid therein, a slider associated with said cover and pivotally supporting said agitator, said agitator having means disposed before and behind the axis thereof for simultaneously engaging said undulating means whereby the latter will oscillate the agitator as the same is moved bodily through the tray.

7. A-device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, an undulating member associated with said cover, a slider arranged over said cover, an agitator pivotally mounted on said slider and extending below said cover to project into the liquid contained in said tray, said agitator having means engaging said undulating member whereby when the agitator is moved bodily through the tray by said slider the I undulating member will automatically cause the oscillation of said agitator.

8. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having a longitudinally extending projection drawn up from said cover to form a guide, a slider having a groove co-operating with said projection on the cover to guide the slider lengthwise of the cover, said cover having an undulating slot therein, an agitator depending from said cover and extending into the liquid in said tray, said agitator being pivotally mounted on said slider and having means engaging the edge of said undulating slot whereby the agitator will be automatically oscillated as the same is moved bodily through said tray.

9. A device of the class described, including a tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having an undulating slot therein, the material at the edges of said slot being turned to form guiding flanges along said slot, a slider and means for guiding the same to move lengthwise of said cover, a pivotal agitator depending from said cover into the liquid in said tray, -means for pivotally supporting said agitator on said slider, and means on said agitator for engaging the flanges of said undulating slot whereby the agitator will be automatically oscillated as it is moved bodily through said tray.

10. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having a central guiding member arranged longitudinally thereof, a slider movable lengthwise of said cover and guided by said guiding means on the cover, a plurality of agitators depending from said cover and disposed on opposite sides of the median line of said cover and projecting into the liquid in said tray, said cover having undulating members, means for pivotally supporting said agitators from said slider, said agitators having means engaging said undulating members whereby the latter will automatically oscillate said agitators as the same are bodily moved through the tray with said slider.

11. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for saidtray, said cover having undulating slots, a slider arranged above said cover and movable lengthwise thereof, agitators depending from said cover to extend into the liquid in said tray, means for pivotally mounting said agitators on said slider, pins on said agitators projecting through said undulating slots of the cover whereby said agitators will be automatically oscillated as they arereciprocated through the tray with said slider, said cover having elongated slots through which said pins project to permit the agitators to oscillate.

12. A device of the class described, including a tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having an undulating slot, an agitator depending from said cover to extend into the liquid in said tray, a slider movable over said cover, means for pivotally supporting said agitator from said slider, pins on said agitator projecting through said undulating slot and keys on said slider adapted to detachably lock said pins whereby the agitators are detachably secured to said slider.

13. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, said cover having undulating slots, a slider arranged above saidcover and adapted to cover said undulating slots when in closed position, agitators depending from said cover, means for pivotally supporting the agitators on said slider and pins on said agitators passing through said undulating slots of the cover and adapted to co-operate with said slots to cause the automatic oscillation of said agitators as they are moved bodily through said tray.

14. A device of the class described, including an elongated tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, means on the under side of said cover forming a raceway, a slider movable in said raceway, agitators pivotally mounted on said slider to project into the liquid in said tray, and undulating means on the under side of said cover adapted to act on said agitators to automatically oscillate the same as they are moved bodily through the tray with said slider.

15. A device of the class described, including a tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray", bars secured to the under side of said cover and having opposed flanges forming, in conjunction with a, portion of the cover, a raceway, a slider movable in said raceway and accessible for operation outide of said tray, agitators pivotally supported from said slider and projecting into the liquid in said tray, said bars having undulating surfaces and means on said agitators engaging said undulating surfaces whereby the agitators will be automatically oscillated as they are moved bodily through the tray.

16. A device of the class described, including a tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling by said slider and projecting into the liquid in said tray, said bars having undulating edges, and means on said agitators co-operating' with said undulating edges whereby the agitators are oscillated automatically as they are reciprocated through the tray with said slider.

17. A device of the class described, including a tray or drawer adapted to hold a supply of liquid to be frozen, adapted to be placed in the cooling coil of a refrigerator, a cover for said tray, bars disposed on the under side of said cover and having opposed flanges forming, in conjunction with the cover a raceway, a slider movable in said race- Way and accessible for operation from the exterior of said tray, a cross member slidable below said bars and having a portion projecting between said flanges to engage said slider, means for detachably securing said cross member to said slider, agitators revolvably mounted on said cross member and extending into the liquid in said tray, said bars having undulating edges, and said agitators having members engaging said undulating edges whereby the agitators are automatically oscillated as they are moved bodily through the tray with said slider.

ARTHUR J. FELTAULT.

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